To calculate how much Ms. Tanaka will earn for selling 12 televisions this month, we can substitute \( t = 12 \) into the earnings formula:
\[ E = 2,500 + 100t \]
Substituting \( t = 12 \):
\[ E = 2,500 + 100(12) \] \[ E = 2,500 + 1,200 \] \[ E = 3,700 \]
Thus, Ms. Tanaka will earn $3,700 for selling 12 televisions this month. The correct response is:
$3,700